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Light is essential to our lives, whether it is brightening when the sun rises or turning on the lights when it gets dark at night. You may not

Some people have heard of “plasma” but some of them are not sure what it is.There are some who say that the world's psychic phenomena can be expl

How is heat transferred? Some says “The cold pierced me to the bone“ but does it convey coldness? On the other hand, we feel the sunlight g

Is it true that the space is said to be a vacuum? The answer is both yes and no. Strictly speaking, space is not a vacuum because there

We often hear the word “vacuum” and it is used quite a bit in our daily lives. For example, The vacuum packing for long term food pr